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Titolo:
Synthesis and magnetic studies of copper( II)-manganese(II) heterobinuclear complexes with an oxamido bridge
Autore:
Li, YT; Zhu, XD; Yan, CW; Liao, DZ;
Indirizzi:
Qufu Normal Univ, Dept Chem, Qufu 273165, Shandong, Peoples R China Qufu Normal Univ Qufu Shandong Peoples R China 273165 ng, Peoples R China Qufu Normal Univ, Dept Biol, Qufu 273165, Shandong, Peoples R China Qufu Normal Univ Qufu Shandong Peoples R China 273165 ng, Peoples R China Nankai Univ, Dept Chem, Tianjin 300071, Peoples R China Nankai Univ Tianjin Peoples R China 300071 anjin 300071, Peoples R China
Titolo Testata:
CHINESE JOURNAL OF CHEMISTRY
fascicolo: 5, volume: 19, anno: 2001,
pagine: 475 - 480
SICI:
1001-604X(200105)19:5<475:SAMSOC>2.0.ZU;2-3
Fonte:
ISI
Lingua:
ENG
Soggetto:
EXCHANGE INTERACTION; BINUCLEAR COMPLEXES; CRYSTAL-STRUCTURE; N,N'-BIS(2-AMINOPROPYL)OXAMIDOCOPPER(II);
Keywords:
oxamido-bridge; Cu(II)-Mn(II); heterobinuclear complexes; magnetic properties; synthesis;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
28
Recensione:
Indirizzi per estratti:
Indirizzo: Li, YT Qufu Normal Univ, Dept Chem, Qufu 273165, Shandong, Peoples R ChinaQufu Normal Univ Qufu Shandong Peoples R China 273165 ples R China
Citazione:
Y.T. Li et al., "Synthesis and magnetic studies of copper( II)-manganese(II) heterobinuclear complexes with an oxamido bridge", CHIN J CHEM, 19(5), 2001, pp. 475-480

Abstract

Four new copper(II)-manganese(II) heterobinuclear complexes bridged by N, N' -bis[2-( dimethylamino) ethyl)]oxamido dianion (dmoxae) and end-capped with 1,10-phenanthroline (phen), 5-methyl-1, 10-phenanthroline (Mephen), diaminoethane ten) or 1,3-di-aminopropane (pn), respectively, namely, [Cu (dmoxae)MnL2] (ClO4)(2) (L = phen, Mephen, en, pn), have been synthesized and characterized by elemental analyses, IR, electronic spectral studies, and molar conductivity measurements, The electronic reflectance spectrum indicates the presence of spin exchange-coupling interaction between bridged copper(II) and manganese(II) ions. The cryomagnetic measurements (4.2-300 K) of [Cu(dmoxae)Mn(phen)(2)] (ClO4)(2) (1) and [Cu (dmoxae)Mn(Mephen)(2)] (ClO4)(2) (2) complexes demonstrated an antiferromagnetic interaction between the adjacent manganese(II) and copper(II) ions through the oxamido-bridge within each molecule. On the basis of spin Hamiltonian, (H) over cap = - 2J (S) over cap (1) . (S) over cap (2), the magnetic analysis was carried out for the two complexes and the spin-coupling constant (J) was evaluated as - 35,9 cm(-1) for 1 and - 32.6 cm(-1) for 2. The influence of methyl substitutions in the amine groups of the bridging ligand on magnetic interactions between the metal ions of this kind of complexes is also discussed.

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Documento generato il 04/12/20 alle ore 13:01:38